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Consolidated Statements of Comprehensive Income (Loss) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement of comprehensive income [abstract] |  |  |  |
Net earnings (loss) |  | $ (253) | $ 176 | $ (90)
Other comprehensive income (loss) |  |  |  |
Net actuarial gains (losses) on defined benefit plans, net of tax | [1] | (11) | (26) | 15
Losses on derivatives designated as cash flow hedges, net of tax |  | (1) | 0 | 0
Total items that will not be reclassified subsequently to net earnings |  | (12) | (26) | 15
Gains (losses) on translating net assets of foreign operations, net of tax |  | (11) | (59) | 84
Gains (losses) on financial instruments designated as hedges of foreign operations, net of tax |  | 11 | 21 | (41)
Gains (losses) on derivatives designated as cash flow hedges, net of tax | [2] | 20 | 61 | (8)
Reclassification of gains on derivatives designated as cash flow hedges to net earnings, net of tax | [3] | (110) | (42) | (46)
Total items that will be reclassified subsequently to net earnings |  | (90) | (19) | (11)
Other comprehensive income (loss) |  | (102) | (45) | 4
Total comprehensive income (loss) |  | (355) | 131 | (86)
Total comprehensive income (loss) attributable to: |  |  |  |
TransAlta shareholders |  | (439) | 54 | (210)
Non-controlling interests |  | $ 84 | $ 77 | $ 124
[1] | Net of income tax recovery of $3 million for the year ended Dec. 31, 2020 (2019 — $7 million recovery, 2018 — $5 million expense).
[2] | Net of income tax expense of $8 million for the year ended Dec. 31, 2020 (2019 —$16 million expense, 2018 — $1 million recovery).
[3] | Net of reclassification of income tax expense of $31 million for the year ended Dec. 31, 2020 (2019 —$10 million expense, 2018 — $11 million expense).

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